Bolt Pitch Diameter Calculators

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Bolt Pitch Diameter From Bolt Size And Thread

Calculate bolt pitch diameter from bolt diameter D and bolt pitch P.

For ANSI threads, the bolt pitch diameter Dp is equal to D - 0.65 * P. For ISO threads, the bolt pitch diameter Dp is equal to D - 0.6495191 * P. Use the Result Table option to display a table of bolt pitch diameter versus bolt diameter for the selected bolt schedule.

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CALCULATOR : Bolt Pitch Diameter [FREE] ±

Calculate bolt pitch diameter from bolt diameter and bolt pitch.

The bolt pitch diameter can be calculated by

`Dp = D - fp.P `

where :

D = Bolt Diameter
Dp = Bolt Pitch Diameter
fp = Pitch Factor
P = Bolt Pitch

For ANSI threads fp = 0.65. For ISO threads fp = 0.6495191 (3/8 √3).

Tool Input

bolttype : Bolt Schedule
diabtype : Bolt Diameter Type
- Du : User Defined Bolt Diameter
- Pu : User Defined Pitch Length
- TPIu : User Defined Threads Per Inch
pitchtype : Bolt Pitch Diameter Type
- fpu : User Defined Bolt Pitch Factor

Tool Output

D : Bolt Diameter
Dp : Bolt Pitch Diameter
P : Bolt Pitch
TPI : Bolt Threads Per Inch

Bolt Pitch Diameter From Bolt Size And Thread

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